ASTROSAT CZTI

Data Quality Report

Orbit 54249

Creation date: 2025-10-08T09:38:22.683648
Switch to: Orbit-wise | Merged OBSID-wise
web.py, SVN revision $Rev$

Source files: Data quality report (detailed, human readable) | Data quality report (concise, machine readable)

Observation information


Basic statistics of files

Param Original file Final file
FilenamemodeM0/AS1C09_004T08_9000006514_54249cztM0_level2.fits modeM0/AS1C09_004T08_9000006514_54249cztM0_level2_quad_clean.evt
Size (bytes)2,118,072,960225,564,480
Size2.0 GB 215.1 MB
Events in quadrant A21,988,9471,293,475
Events in quadrant B11,809,7061,855,434
Events in quadrant C13,964,1651,445,364
Events in quadrant D29,180,849929,207

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0785413
B0481063
C0554833
D0997743

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0140
B0140
C0140
D0140

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03860
B03860
C03860
D03860

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A18931486225.682743%
B189324342.292415%
C18932214711.340587%
D18932776741.025776%

Noise dominated fraction

Noise dominated data is calculated using 1-second bins in cleaned event files. If a bin has >2000 counts, and if more than 50% of those come from <1% of pixels, then it is considered to be noise-dominated and hence unusable.

Quadrant # 1 sec bins Bins with >0 counts Bins with >2000 counts High rate bins dominated by noise Noise dominated (total time) Noise dominated (detector-on time) Marked lightcurve
A 20391 18934 3915 3915 19.20% 20.68%
B 20392 18935 134 134 0.66% 0.71%
C 20392 18933 1872 1872 9.18% 9.89%
D 20392 18935 6893 6893 33.80% 36.40%

Top noisy pixels

Top three noisy pixels from each quadrant. If the there are fewer than three noisy pixels in the level2.evt file, extra rows are filled as -1

Pixel properties Quadrant properties
Quadrant DetID PixID Counts Sigma Mean Median Sigma
A 7 29 9494019 22349.27 1725 1679 424.7
A 15 174 2243097 5277.31 1725 1679 424.7
A 12 17 1557954 3664.18 1725 1679 424.7
B 7 0 2703747 6491.28 1959 1889 416.2
B 5 172 357630 854.68 1959 1889 416.2
B 0 213 207610 494.25 1959 1889 416.2
C 1 241 4463490 9080.93 1795 1778 491.3
C 14 254 827462 1680.52 1795 1778 491.3
C 1 29 644901 1308.95 1795 1778 491.3
D 8 176 18777055 45191.23 1466 1400 415.5
D 3 12 2819147 6782.05 1466 1400 415.5
D 13 170 304696 730.0 1466 1400 415.5

Detector plane histogram (DPH)

Histogram calculated using DETX and DETY for each event in the final _common_clean file

Quadrant A Quadrant B
Quadrant D Quadrant C

Count rate plots and images

Plot type Count rate plots Images
Comparison with Poisson distribution
Blue bars denote a histogram of data divided into 1 sec bins.
Red curve is a Poisson curve with rate = median count rate of data.
Quadrant-wise count rates
Data is divided into 100 sec bins
Module-wise count rates for Quadrant A
Data is divided into 100 sec bins
Module-wise count rates for Quadrant B
Data is divided into 100 sec bins
Module-wise count rates for Quadrant C
Data is divided into 100 sec bins
Module-wise count rates for Quadrant D
Data is divided into 100 sec bins

Housekeeping plots

Parameter Plot
CZT HV Monitor
D_VDD
Temperature 1
Veto HV Monitor
Veto LLD
Alpha Counter
_CPM_Rate
CZT Counter
+2.5 Volts monitor
+5 Volts monitor
_ROLL_ROT
_Roll_DEC
_Roll_RA
Veto Counter